Matsumoto, T. and Inoma, A., 1999: The first record of Mesoturrilites (Ammonoidea) from Hokkaido : Studies of the Cretaceous ammonites from Hokkaido and Sakhalin-LXXXIII. Paleontological Research,
Vol.3 No.1,
36-40. 10.2517/prpsj.3.36.

Matsumoto, T. and Inoma, A., 1999: The first record of Mesoturrilites (Ammonoidea) from Hokkaido : Studies of the Cretaceous ammonites from Hokkaido and Sakhalin-LXXXIII. Paleontological Research,
Vol.3 No.1,
36-40. 10.2517/prpsj.3.36.